title: Underestimation of closing volume with increase in airflow obstruction. A study of single-breath nitrogen washout test and spirometry.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002245:Carbon Dioxide / Q000378:metabolism; D003011:Closing Volume; D005260:Female; D005652:Functional Residual Capacity; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology*; D008176:Lung Volume Measurements; D008297:Male; D008875:Middle Aged; D009584:Nitrogen; D010101:Oxygen Consumption; D010993:Plethysmography, Whole Body; D012129:Respiratory Function Tests; D013147:Spirometry; D014109:Total Lung Capacity; D014797:Vital Capacity
chemical_list: D002245:Carbon Dioxide; D009584:Nitrogen